So, you do not plan to include Scala support into IntelliJ IDEA 9? I know that a Scala plugin exists (that was the main reason for me to buy IntelliJ IDEA 8.) However, since it isn’t officially supported, Scala plugin developers seem not to have enough resources.
There are great expectation for Scala, many emerging projects. It’s enough to say that Twitter is being partially re-written in Scala…

If there is any way to include XSL debugging support with Idea 9 it would be absolutely invaluable! Also, when is the release date? I was getting ready to renew my license, but I want to wait until Idea 9 is available since its performance is so much better than Idea 8.